I try to develop custom XPO provider for Devart dotConnect (Oracle) and use it with DevExpress Reporting. So far my custom provider looks like this:
Code: Select all
using System;
using System.Data;
using DevExpress.Xpo.DB;
using DevExpress.Xpo.DB.Helpers;
namespace Quickstarts.Reporting.Service.Host
{
class DevartXpoProvider : BaseOracleConnectionProvider
{
public DevartXpoProvider(IDbConnection connection, AutoCreateOption autoCreateOption) : base(connection, autoCreateOption)
{
}
public static IDataStore CreateProviderFromString(string connectionString, AutoCreateOption autoCreateOption, out IDisposable[] objectsToDisposeOnDisconnect)
{
IDbConnection connection = CreateConnection(connectionString);
objectsToDisposeOnDisconnect = new IDisposable[1]
{
connection
};
return CreateProviderFromConnection(connection, autoCreateOption);
}
public static IDataStore CreateProviderFromConnection(IDbConnection connection, AutoCreateOption autoCreateOption)
{
return (IDataStore)new DevartXpoProvider(connection, autoCreateOption);
}
public static IDbConnection CreateConnection(string connectionString)
{
IDbConnection dbConnection = Devart.Data.Oracle.OracleProviderFactory.Instance.CreateConnection();
dbConnection.ConnectionString = connectionString;
return dbConnection;
}
protected override IDbConnection CreateConnection()
{
return CreateConnection(this.ConnectionString);
}
protected override void CommandBuilderDeriveParameters(IDbCommand command)
{
throw new NotImplementedException();
}
public static void Register()
{
DataStoreBase.RegisterDataStoreProvider(XpoProviderTypeString, new DataStoreCreationFromStringDelegate(CreateProviderFromString));
}
public const string XpoProviderTypeString = "DevartXpoProvider";
}
}
When I tried to use this class in my existing project, I got the following DevExpress.Xpo.DB.Exceptions.SqlExecutionErrorException exception in reporting service’s constructor:
Executing Sql 'declare
begin
insert into "XPObjectType"("TypeName","AssemblyName","OID")values(:p1,:p2,"sq_XPObjectType".nextval);select "sq_XPObjectType".CurrVal into p0 from DUAL;
n := 1; end;' with parameters '{Null},{DevExpress.Xpf.Printing.Service.DataContracts.ServiceFault},{DevExpress.Xpf.Printing.v10.2.Service},{Null}' exception 'Devart.Data.Oracle.OracleException (0x80004005): ORA-01036 illegal variable name/number
at Devart.Data.Oracle.u.a(a0[] A_0, Byte[] A_1, Hashtable A_2)
at Devart.Data.Oracle.OracleCommand.InternalExecute(CommandBehavior behavior, IDisposable disposable, Int32 startRecord, Int32 maxRecords, Boolean nonQuery)
at Devart.Common.DbCommandBase.ExecuteDbDataReader(CommandBehavior behavior, Boolean nonQuery)
at Devart.Data.Oracle.OracleCommand.ExecuteNonQuery()
at DevExpress.Xpo.DB.BaseOracleConnectionProvider.Exec(IDbCommand command, Dictionary`2 parameters)'
at DevExpress.Xpo.DB.BaseOracleConnectionProvider.Exec(IDbCommand command, Dictionary`2 parameters)
at DevExpress.Xpo.DB.BaseOracleConnectionProvider.ProcessModifyData(ModificationStatement[] dmlStatements)
at DevExpress.Xpo.DB.DataStoreSerializedBase.ModifyData(ModificationStatement[] dmlStatements)
at DevExpress.Xpo.DB.ConnectionProviderSql.ModifyData(ModificationStatement[] dmlStatements)
at DevExpress.Xpo.SimpleDataLayer.ModifyData(ModificationStatement[] dmlStatements)
at DevExpress.Xpo.SimpleObjectLayer.CommitChanges(Session session, ICollection fullListForDelete, ICollection completeListForSave)
at DevExpress.Xpo.Session.FlushChangesInsideTransaction()
at DevExpress.Xpo.Session.FlushChanges()
at DevExpress.Xpo.Session.ProcessingProcess(ObjectSet markedObjectsHolder, Object theObject)
at DevExpress.Xpo.Session.Save(Object theObject)
at DevExpress.Xpo.SimpleObjectLayer.CreateObjectType(XPObjectType objectType)
at DevExpress.Xpo.Helpers.XPObjectTypesManager.GetObjectType(XPClassInfo objectType)
at DevExpress.Xpo.Session.GetObjectType(XPClassInfo objectType)
at DevExpress.Xpo.Session.CreateObjectTypeRecords(XPClassInfo[] types)
at DevExpress.Xpo.Session.CreateObjectTypeRecords(Assembly[] assemblies)
at DevExpress.Xpf.Printing.Service.Native.Services.SessionUtilityService.SafeInitialize()
at DevExpress.Xpf.Printing.Service.ExportService..ctor()
The Oracle DB was empty, before I ran this program. Do you have any idea what this exception means? Is there any problem with parameters used in command? Something related to "Original_" prefix?
Best Regards,
Peter